Question about olive oil hair treatment?

I have dry, frizzy, naturally curly hair. I have been looking for the best way to keep it nice and conditioned and not frizzy. I want my curls to be a lot more defined and my hair to be healthier. I just recently heard about the Olive oil hair treatment. I want to know will it really work? Does it condition your hair really good? And will it help my curls be more defined?Question about olive oil hair treatment?
I used to use olive oil and put hot damp towels round my head, but the truth is it just doesn't work for me. I've since started using Elvive's overnight leave-in serum and it works wonders.